Railroad Archives Online
- CollectionD0059 - David Emerson Collection
- Series003 - Great Northern Railway Company (U.S.)
- Subseries Level 1014 - Photographs
- Subseries Level 2001 - Railroads--Equipment and Supplies
- Subseries Level 3001 - Steam Locomotives
- 58 more...
- ItemDEGN201314068 - Great Northern Steam Powered Freight Train, undated
- ItemDEGN201314069 - Great Northern Steam Powered Freight Train, undated
- ItemDEGN201314072 - Great Northern Steam Locomotive S-2 at Somers, Montana, 1981
- ItemDEGN201314073 - Great Northern Steam Locomotive S-2 at Hillyard, Washington, 1935
- ItemDEGN201314076 - Great Northern Steam Locomotive 1721, undated